book Maths Puzzle Numerical Ability

i need to know a bout co-ordinates but it dousnt say it on the choises
so can you answer this question on wher the origin is on a co-ordinate graph.

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book Other Question

My question says to remember the formula 1020 sqrt P (1-.01 sqrt P)=G. If P is the population in thousands. this formula is the amount of water in gallons per minute the city needs what is the slope and y intercept of 4x-5y=20?